Save pdf from raw body text API-response to Firebase. Issue: Saves empty pdf with correct name

// Automatic FlutterFlow imports
import '/backend/backend.dart';
import '/backend/schema/structs/index.dart';
import '/flutter_flow/flutter_flow_theme.dart';
import '/flutter_flow/flutter_flow_util.dart';
import '/custom_code/actions/index.dart'; // Imports other custom actions
import '/flutter_flow/custom_functions.dart'; // Imports custom functions
import 'package:flutter/material.dart';
// Begin custom action code
// DO NOT REMOVE OR MODIFY THE CODE ABOVE!

import 'dart:convert';
import 'dart:typed_data';
import 'package:firebase_auth/firebase_auth.dart';
import '../../backend/firebase_storage/storage.dart';

Future<String?> uploadRawFileToFB(String bytes) async {
  try {
    // Get the current user's UID to use in the file path
    final String currentUserUid =
        FirebaseAuth.instance.currentUser?.uid ?? 'default_user';

    // Convert the raw bytes string to a Uint8List
    Uint8List fileBytes = Uint8List.fromList(utf8.encode(bytes));
    String directoryPath = '/users/' + currentUserUid + '/pdfs';
    String fileName = 'file-${DateTime.now().millisecondsSinceEpoch}.pdf';

    // Upload the file to Firebase and get the download URL
    String? downloadUrl =
        await uploadData(directoryPath + '/' + fileName, fileBytes);
    return downloadUrl;
  } catch (e) {
    print('Error uploading file: $e');
    return null;
  }
}